3v4l.org

run code in 300+ PHP versions simultaneously
<?php for ($i = 48; $i < 9999; $i++) { $hash = md5("preved$i"); if (is_numeric($hash)) { echo "$i $hash "; var_dump(is_numeric($hash)); echo "\n"; break; } }
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
preferences:
190.3 ms | 404 KiB | 245 Q